Title

Location

St. Louis, Missouri

Session Start Date

4-2-1995

Session End Date

4-7-1995

Abstract

A preliminary numerical investigation is presented on the long distance effects of soil-structure interaction for important buildings located on soft soils. A simple 20 model is considered, with homogeneous rectangular buildings resting on a single, horizontal, soft layer overlying a much stiffer half-space, impinged by SH waves. Computations are made for different parameter sets, in order to analyze the respective effects of the main parameters: clay layer thickness and frequency, building size, and spacing between buildings. For realistic building properties, wave diffraction related with soil- structure interaction is shown to alter the "free-field" surface motion up to distances of at least 1 km from the next building: duration as well as amplitude are significantly increased at some frequencies, while they may be reduced at other frequencies.

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Apr 2nd, 12:00 AMApr 7th, 12:00 AM

Effect of Built Environment on "Free-Field" Motion for Very Soft, Urbanized Sites

St. Louis, Missouri

A preliminary numerical investigation is presented on the long distance effects of soil-structure interaction for important buildings located on soft soils. A simple 20 model is considered, with homogeneous rectangular buildings resting on a single, horizontal, soft layer overlying a much stiffer half-space, impinged by SH waves. Computations are made for different parameter sets, in order to analyze the respective effects of the main parameters: clay layer thickness and frequency, building size, and spacing between buildings. For realistic building properties, wave diffraction related with soil- structure interaction is shown to alter the "free-field" surface motion up to distances of at least 1 km from the next building: duration as well as amplitude are significantly increased at some frequencies, while they may be reduced at other frequencies.